五、信息还原
The Yangtze River is the longest river in China and the third longest river in the world. 1 It is about 6,300 kilometres long. It starts from the Tanggula Mountains and runs through some provinces including Qinghai, Xizang, Sichuan, Yunnan and so on. 2
During the long history of ancient China, this river helped feed millions of people and develop amazing cultures. The important cities such as Shanghai and Nanjing are sitting along the river. 3 The water in it became dirty because people's life affected(影响) it in many ways. Luckily, people soon realized the importance of protecting the Yangtze River. A programme was set up in 1989 to protect the water and land around the river. It was successful because it helped improve the environment. 4 It helps protect white - flag dolphins(白鳍豚), one of the rarest(最珍贵的) animals in the world. The number of white - flag dolphins in China dropped because of the pollution in the Yangtze River. 5 However, we still have a long way to go to protect the great river. Let's work together to help our Mother River become as clean as it used to be.

五、1—5 FBDCA

【分析】本题为英语信息还原题，解题思路是先通读全文，明确文章围绕长江的基本情况、作用、面临问题及保护措施展开；再结合空格前后的语境，匹配逻辑连贯的选项：第1空需对应“世界第三长河”的描述，第2空需对应长江的流向，第3空需承接上文的重要性并转折到问题，第4空需承接保护项目并引出白鳍豚，第5空需与后文形成转折，最终确定各空答案。
【解析】1. 第1空：前文提到长江是世界第三长河，F选项“它仅次于非洲的尼罗河和南美洲的亚马逊河”，与“第三长河”的描述匹配，故填F；2. 第2空：前文介绍长江的发源地和流经省份，B选项“最后，它流入上海的海洋”，说明长江的最终流向，符合语境，故填B；3. 第3空：前文讲长江的重要性，后文提到江水变脏，D选项“然而，长江也面临一些问题”，起到承上启下的转折作用，故填D；4. 第4空：前文提到保护项目成功，后文介绍白鳍豚保护，C选项“另一个项目是关于自然保护的”，承接上文的项目，引出下文内容，故填C；5. 第5空：前文说白鳍豚数量下降，后文说还有很长路要走，A选项“到目前为止，我们已经取得了一些成就”，与后文形成转折，符合逻辑，故填A。
【答案】FBDCA
【知识点】英语信息还原、语篇衔接
【点评】本题考查英语语篇的逻辑理解与衔接能力，要求学生结合上下文语境匹配合适的句子，难度适中，注重基础语篇分析能力的考查。
【难度系数】0.5